From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A85E2D1F9A1 for ; Thu, 4 Dec 2025 09:48:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/b54dtjfLCpQPfTXWOh1TwTgLOx2rTYAakzbfZ4vFYI=; b=Wy7CakcipkcZUXWo2NX8tsLLC/ svDpxXh4tV90goUzq5SePxT1lA+XEuVkf1PxylYCo2Fe0GQnfPOMFZhJ2WhR8Cihe+9yzegH+/Ej9 j1qqgsoSc4L50qJu8zi8lLojZBp6FCWqZEmsS0aqGcZdt5V9/bHNnKriYd8My6LieLeSiDDQEu+3l eL6jTGAB4EFkk0oLuqMQRyx7Q7zvdvnKycFwKdOfNvU2be9Yg/599pUXBTdqJ3AddN6CnwcpP689q t0+jqM3jibeCmaalkMgIhXc2EKYbEq2fy5pRSIRIyoGXzZ8HM9JOfNrY9aC0809IeffoNqQmJu92d cUcitQfg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vR5x1-00000007mqv-15BO; Thu, 04 Dec 2025 09:48:39 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vR5x0-00000007mqE-27dY for linux-arm-kernel@lists.infradead.org; Thu, 04 Dec 2025 09:48:38 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id E5B08601E4; Thu, 4 Dec 2025 09:48:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2B5BC113D0; Thu, 4 Dec 2025 09:48:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764841717; bh=il8COfiF1FhMwmH8tRnlXmaXeF2Tmchwrjdh9u49mVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s28FcMyjwMNwULAc6L+uyVPfLy+inyctkJtZBE6bRUqO8KtDrGYxsTM8+d/I+1X1F diAHfHPxLvUuv6QTHSJ92VCAKA4ZhiaS3gZyu/xf1Yrr3yA9XK4PHS5bp1Xr9KFn6O ltbB7QsSM2TXO+I+CIsJhr+9w36/0/R6D4pNBoDLgsXBV5HK7XiveuRHaXgC4BwmIM tMuT/dWEOwPHMZVJ5ylVJEPjxHuFndgYNzmEXn5rPF3kHgQalI/kFx6pnzHkJBFjFa ZoNUXp/ihvw7cy4yzL2h9f6vqGXH8Xs5aI2RXjd5fQltj7L146IeCa2tyaZnsBhF9v S7Pe0JQ3RdoTA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vR5ww-0000000AP90-3Vw7; Thu, 04 Dec 2025 09:48:34 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Ben Horgan , Yao Yuan Subject: [PATCH v3 3/9] KVM: arm64: Add a generic synchronous exception injection primitive Date: Thu, 4 Dec 2025 09:48:00 +0000 Message-ID: <20251204094806.3846619-4-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251204094806.3846619-1-maz@kernel.org> References: <20251204094806.3846619-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, ben.horgan@arm.com, yaoyuan@linux.alibaba.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Maybe in a surprising way, we don't currently have a generic way to inject a synchronous exception at the EL the vcpu is currently running at. Extract such primitive from the UNDEF injection code. Reviewed-by: Ben Horgan Reviewed-by: Yuan Yao Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_emulate.h | 1 + arch/arm64/kvm/inject_fault.c | 10 +++++++--- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index c9eab316398e2..df20d47f0d256 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -45,6 +45,7 @@ bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); void kvm_skip_instr32(struct kvm_vcpu *vcpu); void kvm_inject_undefined(struct kvm_vcpu *vcpu); +void kvm_inject_sync(struct kvm_vcpu *vcpu, u64 esr); int kvm_inject_serror_esr(struct kvm_vcpu *vcpu, u64 esr); int kvm_inject_sea(struct kvm_vcpu *vcpu, bool iabt, u64 addr); void kvm_inject_size_fault(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c index dfcd66c655179..7102424a3fa5e 100644 --- a/arch/arm64/kvm/inject_fault.c +++ b/arch/arm64/kvm/inject_fault.c @@ -162,12 +162,16 @@ static void inject_abt64(struct kvm_vcpu *vcpu, bool is_iabt, unsigned long addr vcpu_write_sys_reg(vcpu, esr, exception_esr_elx(vcpu)); } +void kvm_inject_sync(struct kvm_vcpu *vcpu, u64 esr) +{ + pend_sync_exception(vcpu); + vcpu_write_sys_reg(vcpu, esr, exception_esr_elx(vcpu)); +} + static void inject_undef64(struct kvm_vcpu *vcpu) { u64 esr = (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT); - pend_sync_exception(vcpu); - /* * Build an unknown exception, depending on the instruction * set. @@ -175,7 +179,7 @@ static void inject_undef64(struct kvm_vcpu *vcpu) if (kvm_vcpu_trap_il_is32bit(vcpu)) esr |= ESR_ELx_IL; - vcpu_write_sys_reg(vcpu, esr, exception_esr_elx(vcpu)); + kvm_inject_sync(vcpu, esr); } #define DFSR_FSC_EXTABT_LPAE 0x10 -- 2.47.3